The Honeywell QuietCare HEPA Air Purifier 17000 has been specially engineered to provide ultra quiet high speed operation. The QuietCare 17000 minimizes noise using: sound reducing insulation, patented air purifier technology, specially designed fan blade for maximum airflow and minimum noise, specially designed air intake and exhaust grilles, rubber isolated motor mount, and soft cushioned feet. The patented air purifier technology releases filtered air upwards into the room, where you breathe it.